#include <stdio.h>
#include <stdlib.h>

/*四方定理*/

void main ()
{
    int number,i,j,k,l;
    printf("Plese enter a number=");
    scanf("%d",&number);
    for(i=1;i<number/2;i++)
        for(j=0;j<=i;j++)
            for(k=0;k<=j;k++)
                for(l=0;l<=k;l++)
                    if(number==i*i+j*j+k*k+l*l)
                    {
                        printf("%d=%d*%d+%d*%d+%d*%d+%d*%d\n",
                                number,i,i,j,j,k,k,l,l);
                                exit(0);
                    }
}
